774
FNCA52 TJSJ 060730
FWFSJU
FIRE WEATHER PLANNING FORECAST FOR PUERTO RICO
NATIONAL WEATHER SERVICE SAN JUAN PR
330 AM AST MON JUL 6 2026
DISCUSSION
WEATHER CONDITIONS WILL BE LESS SUPPORTIVE OF RAPID WILDFIRE
GROWTH TODAY AND TUESDAY AS LOW-LEVEL MOISTURE AND RELATIVE
HUMIDITY INCREASE. HOWEVER, CRITICALLY DRY FUELS AND SEVERE SOIL
MOISTURE DEFICITS PERSIST ACROSS PORTIONS OF SOUTHERN PUERTO
RICO, WITH KEETCH-BYRAM DROUGHT INDEX (KBDI) VALUES REMAINING
ABOVE 550 AND LOCALLY EXCEEDING 660. ANY FIRE THAT DEVELOPS MAY
STILL SPREAD THROUGH THE DRY VEGETATION, PARTICULARLY ACROSS THE
SOUTHERN COASTAL PLAINS AND ADJACENT LOWER ELEVATIONS, ALTHOUGH
INCREASED HUMIDITY SHOULD LIMIT FIRE GROWTH COMPARED TO RECENT
DAYS. RESIDENTS AND VISITORS SHOULD CONTINUE TO AVOID OUTDOOR
BURNING AND EXERCISE CAUTION WITH ANY ACTIVITY CAPABLE OF
PRODUCING SPARKS OR OPEN FLAMES.
PRZ014-062000-
SOUTHEAST COASTAL PLAINS-
330 AM AST MON JUL 6 2026
TODAY TONIGHT TUE
CLOUD COVER PCLDY MCLEAR MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 20 10 20
TEMP (24H TREND) 93 (+2) 75 (-2) 92
RH % (24H TREND) 47 (-4) 86 (+2) 48
WIND 20FT/EARLY(MPH) E 18 E 16 E 18
WIND 20FT/LATE(MPH) E 18 E 14 E 19
MIXING HGT(FT-AGL/MSL)5170 5240
TRANSPORT WND (MPH) E 22 E 23
VENT RATE (KT-FT) 98230 104800
DISPERSION 5 5
DSI 6 5 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ015-062000-
SOUTHERN HILLS-
330 AM AST MON JUL 6 2026
TODAY TONIGHT TUE
CLOUD COVER PCLDY MCLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 20 10 20
TEMP (24H TREND) 89 (+3) 71 (-3) 89
RH % (24H TREND) 58 (-4) 96 (+6) 58
WIND 20FT/EARLY(MPH) E 14 E 16 E 16
WIND 20FT/LATE(MPH) E 14 E 16 E 16
MIXING HGT(FT-AGL/MSL)5840 5600
TRANSPORT WND (MPH) E 22 E 22
VENT RATE (KT-FT) 110960 106400
DISPERSION 5 5
DSI 6 4 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ016-062000-
NORTH COASTAL PLAINS-
330 AM AST MON JUL 6 2026
TODAY TONIGHT TUE
CLOUD COVER PCLDY MCLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 20 10 30
TEMP (24H TREND) 91 (+2) 74 (-3) 90
RH % (24H TREND) 59 (-5) 96 (+5) 60
WIND 20FT/EARLY(MPH) E 17 E 18 E 18
WIND 20FT/LATE(MPH) E 21 E 14 E 23
MIXING HGT(FT-AGL/MSL)5470 5370
TRANSPORT WND (MPH) E 23 E 22
VENT RATE (KT-FT) 109400 102030
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ017-062000-
NORTHERN HILLS-
330 AM AST MON JUL 6 2026
TODAY TONIGHT TUE
CLOUD COVER PCLDY MCLEAR MCLEAR
PRECIP TYPE SHOWERS NONE SHOWERS
CHANCE PRECIP (%) 30 0 20
TEMP (24H TREND) 89 (+1) 72 (-2) 89
RH % (24H TREND) 60 (-3) 97 (+4) 62
WIND 20FT/EARLY(MPH) E 16 E 16 E 17
WIND 20FT/LATE(MPH) E 19 E 12 E 20
MIXING HGT(FT-AGL/MSL)6650 5840
TRANSPORT WND (MPH) E 18 E 20
VENT RATE (KT-FT) 106400 99280
DISPERSION 5 5
DSI 6 5 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ018-062000-
WEST COAST-
330 AM AST MON JUL 6 2026
TODAY TONIGHT TUE
CLOUD COVER MCLEAR MCLEAR PCLDY
PRECIP TYPE SHOWERS NONE SHOWERS
CHANCE PRECIP (%) 20 0 20
TEMP (24H TREND) 93 (+1) 74 (-1) 93
RH % (24H TREND) 55 (-6) 93 (+3) 57
WIND 20FT/EARLY(MPH) E 16 E 16 E 17
WIND 20FT/LATE(MPH) E 16 E 13 E 17
MIXING HGT(FT-AGL/MSL)5130 4740
TRANSPORT WND (MPH) E 15 E 15
VENT RATE (KT-FT) 66690 61620
DISPERSION 5 5
DSI 6 5 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ019-062000-
EASTERN INTERIOR-
330 AM AST MON JUL 6 2026
TODAY TONIGHT TUE
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 30 20 30
TEMP (24H TREND) 89 (+2) 72 (-4) 89
RH % (24H TREND) 59 (-4) 98 (+5) 61
WIND 20FT/EARLY(MPH) E 17 E 16 E 17
WIND 20FT/LATE(MPH) E 16 E 16 E 17
MIXING HGT(FT-AGL/MSL)6070 5890
TRANSPORT WND (MPH) E 22 E 22
VENT RATE (KT-FT) 115330 111910
DISPERSION 5 5
DSI 6 4 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ022-062000-
LUQUILLO MOUNTAIN RANGE-
330 AM AST MON JUL 6 2026
TODAY TONIGHT TUE
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 30 30 30
TEMP (24H TREND) 85 (+4) 70 (-3) 83
RH % (24H TREND) 67 (-7) 100 (+4) 69
WIND 20FT/EARLY(MPH) E 14 E 13 E 16
WIND 20FT/LATE(MPH) E 14 E 13 E 16
MIXING HGT(FT-AGL/MSL)4670 4370
TRANSPORT WND (MPH) E 23 E 24
VENT RATE (KT-FT) 93400 91770
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ023-062000-
CENTRAL MOUNTAIN RANGE-
330 AM AST MON JUL 6 2026
TODAY TONIGHT TUE
CLOUD COVER PCLDY MCLEAR MCLEAR
PRECIP TYPE SHOWERS NONE SHOWERS
CHANCE PRECIP (%) 20 0 20
TEMP (24H TREND) 88 (+4) 69 (-3) 88
RH % (24H TREND) 61 (-5) 98 (+5) 63
WIND 20FT/EARLY(MPH) E 11 E 11 E 12
WIND 20FT/LATE(MPH) E 12 E 11 E 13
MIXING HGT(FT-AGL/MSL)7410 6720
TRANSPORT WND (MPH) E 16 E 16
VENT RATE (KT-FT) 103740 94080
DISPERSION 5 5
DSI 6 3 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ024-062000-
CAYEY MOUNTAIN RANGE-
330 AM AST MON JUL 6 2026
TODAY TONIGHT TUE
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 40 30 30
TEMP (24H TREND) 84 (+1) 71 (-2) 84
RH % (24H TREND) 66 (-2) 100 (+3) 68
WIND 20FT/EARLY(MPH) E 13 E 13 E 14
WIND 20FT/LATE(MPH) E 13 E 13 E 14
MIXING HGT(FT-AGL/MSL)5040 5250
TRANSPORT WND (MPH) E 23 E 24
VENT RATE (KT-FT) 100800 110250
DISPERSION 5 5
DSI 6 5 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ025-062000-
VIEQUES-
330 AM AST MON JUL 6 2026
TODAY TONIGHT TUE
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 30 20 30
TEMP (24H TREND) 89 (+1) 77 (-2) 89
RH % (24H TREND) 58 (-4) 90 (+4) 58
WIND 20FT/EARLY(MPH) E 19 E 19 E 19
WIND 20FT/LATE(MPH) E 18 E 20 E 19
MIXING HGT(FT-AGL/MSL)3400 3700
TRANSPORT WND (MPH) E 24 E 26
VENT RATE (KT-FT) 71400 85100
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ026-062000-
CULEBRA-
330 AM AST MON JUL 6 2026
TODAY TONIGHT TUE
CLOUD COVER PCLDY MCLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 20 20 30
TEMP (24H TREND) 92 (+3) 78 (-2) 92
RH % (24H TREND) 57 (-8) 92 (+5) 57
WIND 20FT/EARLY(MPH) E 19 E 19 E 19
WIND 20FT/LATE(MPH) E 18 E 19 E 19
MIXING HGT(FT-AGL/MSL)3470 3700
TRANSPORT WND (MPH) E 25 E 26
VENT RATE (KT-FT) 76340 85100
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ027-062000-
SOUTHWEST COASTAL PLAINS AND MONA ISLAND-
330 AM AST MON JUL 6 2026
TODAY TONIGHT TUE
CLOUD COVER MCLEAR MCLEAR MCLEAR
PRECIP TYPE SHOWERS NONE NONE
CHANCE PRECIP (%) 0 0 0
TEMP (24H TREND) 93 (+2) 75 (-3) 93
RH % (24H TREND) 48 (-4) 85 (+3) 47
WIND 20FT/EARLY(MPH) E 23 E 21 E 23 G30
WIND 20FT/LATE(MPH) E 23 E 13 E 24 G31
MIXING HGT(FT-AGL/MSL)5320 5110
TRANSPORT WND (MPH) E 25 E 25
VENT RATE (KT-FT) 117040 112420
DISPERSION 5 5
DSI 6 5 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
VIZ001-062000-
SAINT THOMAS AND SAINT JOHN-
330 AM AST MON JUL 6 2026
TODAY TONIGHT TUE
CLOUD COVER PCLDY MCLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 20 20 20
TEMP (24H TREND) 88 (+2) 76 (-4) 88
RH % (24H TREND) 62 (-6) 93 (+6) 62
WIND 20FT/EARLY(MPH) E 20 E 19 E 20
WIND 20FT/LATE(MPH) E 18 E 19 E 20
MIXING HGT(FT-AGL/MSL)3450 3500
TRANSPORT WND (MPH) E 24 E 26
VENT RATE (KT-FT) 72450 80500
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
VIZ002-062000-
ST CROIX-
330 AM AST MON JUL 6 2026
TODAY TONIGHT TUE
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 20 20 20
TEMP (24H TREND) 89 (+2) 77 (-3) 89
RH % (24H TREND) 61 (-6) 92 (+4) 62
WIND 20FT/EARLY(MPH) E 20 E 18 E 20
WIND 20FT/LATE(MPH) E 18 E 19 E 19
MIXING HGT(FT-AGL/MSL)4830 4940
TRANSPORT WND (MPH) E 26 E 26
VENT RATE (KT-FT) 111090 113620
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
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